# Copyright 2008 - 2013 Roland Schwarz
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE.txt or copy at
# https://www.bfgroup.xyz/b2/LICENSE.txt)

# Boost library support module.
#
# This module allows to use the boost library from boost-build projects. The
# location of a boost source tree or the path to a pre-built version of the
# library can be configured from either site-config.jam or user-config.jam. If
# no location is configured the module looks for a BOOST_ROOT environment
# variable, which should point to a boost source tree. As a last resort it tries
# to use pre-built libraries from the standard search path of the compiler.
#
# If the location to a source tree is known, the module can be configured from
# the *-config.jam files:
#
# using boost : 1.35 : <root>/path-to-boost-root ;
#
# If the location to a pre-built version is known:
#
# using boost : 1.34
#   : <include>/usr/local/include/boost_1_34
#     <library>/usr/local/lib
#   ;
#
# It is legal to configure more than one boost library version in the config
# files. The version identifier is used to disambiguate between them. The first
# configured version becomes the default.
#
# To use a boost library you need to put a 'use' statement into your Jamfile:
#
# import boost ;
#
# boost.use-project 1.35 ;
#
# If you do not care about a specific version you just can omit the version
# part, in which case the default is picked up:
#
# boost.use-project ;
#
# The library can be referenced with the project identifier '/boost'. To
# reference the program_options you would specify:
#
# exe myexe : mysrc.cpp : <library>/boost//program_options ;
#
# Note that the requirements are automatically transformed into suitable tags to
# find the correct pre-built library.
#

import common ;
import modules ;
import numbers ;
import project ;
import property-set ;
import regex ;
import toolset ;

.boost.auto_config = [ property-set.create <layout>system ] ;

if [ MATCH (--debug-configuration) : [ modules.peek : ARGV ] ]
{
    .debug-configuration = true ;
}

# Configuration of the boost library to use.
#
# This can either be a boost source tree or pre-built libraries. The 'version'
# parameter must be a valid boost version number, e.g. 1.35, if specifying a
# pre-built version with versioned layout. It may be a symbolic name, e.g.
# 'trunk' if specifying a source tree. The options are specified as named
# parameters (like properties). The following parameters are available:
#
# <root>/path-to-boost-root            : Specify a source tree.
# <include>/path-to-include            : The include directory to search.
# <library>/path-to-library            : The library directory to search.
# <layout>system or <layout>versioned  : Built library layout.
# <build-id>my_build_id                : The custom build id to use.
#
rule init
(
    version     # Version identifier.
    : options * # Set the option properties.
)
{
    if $(.boost.$(version))
    {
        import errors ;
        errors.user-error Boost $(version) already configured. ;
    }
    else
    {
        if $(.debug-configuration)
        {
            if ! $(.boost_default)
            {
                echo notice\: configuring default boost library $(version) ;
            }
            echo notice\: configuring boost library $(version) ;
        }
        .boost_default ?= $(version) ; # the first configured is default
        .boost.$(version) = [ property-set.create $(options) ] ;
    }
}

# Use a certain version of the library.
#
# The use-project rule causes the module to define a boost project of searchable
# pre-built boost libraries, or references a source tree of the boost library.
# If the 'version' parameter is omitted either the configured default (first in
# config files) is used or an auto configuration will be attempted.
#
rule use-project
(
    version ? # The version of the library to use.
)
{
    project.push-current [ project.current ] ;
    version ?= $(.boost_default) ;
    version ?= auto_config ;

    if $(.initialized)
    {
        if $(.initialized) != $(version)
        {
            import errors ;
            errors.user-error Attempt to use $(__name__) with different
                parameters. ;
        }
    }
    else
    {
        if $(.boost.$(version))
        {
            local opt  = $(.boost.$(version)) ;
            local root = [ $(opt).get <root> ] ;
            local inc  = [ $(opt).get <include> ] ;
            local lib  = [ $(opt).get <library> ] ;

            if $(.debug-configuration)
            {
                echo notice\: using boost library $(version) [ $(opt).raw ] ;
            }

            .layout = [ $(opt).get <layout> ] ;
            .layout ?= versioned ;
            .build_id = [ $(opt).get <build-id> ] ;
            .version_tag = [ regex.replace $(version) "[*\\/:.\"\' ]" "_" ] ;
            .initialized = $(version) ;

            if ( $(root) && $(inc) )
                || ( $(root) && $(lib) )
                || ( $(lib) && ! $(inc) )
                || ( ! $(lib) && $(inc) )
            {
                import errors ;
                errors.user-error Ambiguous parameters, use either <root> or
                    <include> with <library>. ;
            }
            else if ! $(root) && ! $(inc)
            {
                root = [ modules.peek : BOOST_ROOT ] ;
            }

            local prj = [ project.current ] ;
            local mod = [ $(prj).project-module ] ;

            if $(root)
            {
                modules.call-in $(mod) : use-project boost : $(root) ;
            }
            else
            {
                project.initialize $(__name__) ;
                # It is possible to override the setup of the searched libraries
                # per version. The (unlikely) 0.0.1 tag is meant as an example
                # template only.
                switch $(version)
                {
                    case 0.0.1 : boost_0_0_1 $(inc) $(lib) ;
                    case * : boost_std $(inc) $(lib) ;
                }
            }
        }
        else
        {
            import errors ;
            errors.user-error Reference to unconfigured boost version. ;
        }
    }
    project.pop-current ;
}

local rule boost_lib_std ( id : shared-lib-define )
{
    lib $(id) : : : : <link>shared:<define>$(shared-lib-define) ;
}

rule boost_std ( inc ? lib ? )
{
#   The default definitions for pre-built libraries.

    project boost
        : usage-requirements <include>$(inc) <define>BOOST_ALL_NO_LIB
        : requirements <tag>@tag_std <search>$(lib)
        ;

    alias headers ;
    boost_lib_std chrono              : BOOST_CHRONO_DYN_LINK ;
    boost_lib_std container           : BOOST_CONTAINER_DYN_LINK ;
    boost_lib_std date_time           : BOOST_DATE_TIME_DYN_LINK ;
    boost_lib_std filesystem          : BOOST_FILE_SYSTEM_DYN_LINK ;
    boost_lib_std graph               : BOOST_GRAPH_DYN_LINK ;
    boost_lib_std graph_parallel      : BOOST_GRAPH_DYN_LINK ;
    boost_lib_std iostreams           : BOOST_IOSTREAMS_DYN_LINK ;
    boost_lib_std json                : BOOST_JSON_DYN_LINK ;
    boost_lib_std locale              : BOOST_LOCALE_DYN_LINK ;
    boost_lib_std log                 : BOOST_LOG_DYN_LINK  ;
    boost_lib_std log_setup           : BOOST_LOG_SETUP_DYN_LINK  ;
    boost_lib_std math_c99            : BOOST_MATH_TR1_DYN_LINK ;
    boost_lib_std math_c99f           : BOOST_MATH_TR1_DYN_LINK ;
    boost_lib_std math_c99l           : BOOST_MATH_TR1_DYN_LINK ;
    boost_lib_std math_tr1            : BOOST_MATH_TR1_DYN_LINK ;
    boost_lib_std math_tr1f           : BOOST_MATH_TR1_DYN_LINK ;
    boost_lib_std math_tr1l           : BOOST_MATH_TR1_DYN_LINK ;
    boost_lib_std mpi                 : BOOST_MPI_DYN_LINK  ;
    boost_lib_std prg_exec_monitor    : BOOST_TEST_DYN_LINK ;
    boost_lib_std program_options     : BOOST_PROGRAM_OPTIONS_DYN_LINK ;
    boost_lib_std python              : BOOST_PYTHON_DYN_LINK ;
    boost_lib_std python3             : BOOST_PYTHON_DYN_LINK ;
    boost_lib_std random              : BOOST_RANDOM_DYN_LINK ;
    boost_lib_std regex               : BOOST_REGEX_DYN_LINK  ;
    boost_lib_std serialization       : BOOST_SERIALIZATION_DYN_LINK ;
    boost_lib_std signals             : BOOST_SIGNALS_DYN_LINK  ;
    boost_lib_std system              : BOOST_SYSTEM_DYN_LINK  ;
    boost_lib_std test_exec_monitor   : BOOST_TEST_DYN_LINK ;
    boost_lib_std thread              : BOOST_THREAD_DYN_DLL  ;
    boost_lib_std timer               : BOOST_TIMER_DYN_DLL  ;
    boost_lib_std unit_test_framework : BOOST_TEST_DYN_LINK  ;
    boost_lib_std wave                : BOOST_WAVE_DYN_LINK  ;
    boost_lib_std wserialization      : BOOST_SERIALIZATION_DYN_LINK ;
}

# Example placeholder for rules defining Boost library project & library targets
# for a specific Boost library version. Copy under a different name and model
# after the boost_std rule. Please note that it is also possible to have a per
# version taging rule in case the tagging algorithm changes between versions.
#
rule boost_0_0_1 ( inc ? lib ? )
{
    echo "You are trying to use an example placeholder for boost libs." ;
}

rule tag_std ( name : type ? : property-set )
{
    name = boost_$(name) ;
    if  ( [ $(property-set).get <link> ] in static ) &&
        ( [ $(property-set).get <target-os> ] in windows )
    {
        name = lib$(name) ;
    }

    local result ;
    if $(.layout) = system
    {
        local version = [ MATCH "^([0-9]+)_([0-9]+)" : $(.version_tag) ] ;
        if $(version[1]) = "1" && [ numbers.less $(version[2]) 39 ]
        {
            result = [ tag_tagged $(name) : $(type) : $(property-set) ] ;
        }
        else
        {
            result = [ tag_system $(name) : $(type) : $(property-set) ] ;
        }
    }
    else if $(.layout) = tagged
    {
        result = [ tag_tagged $(name) : $(type) : $(property-set) ] ;
    }
    else if $(.layout) = versioned
    {
        result = [ tag_versioned $(name) : $(type) : $(property-set) ] ;
    }
    else
    {
        import errors ;
        errors.error Missing layout. ;
    }

    return $(result) ;
}

rule tag_system ( name : type ? : property-set )
{
    return [ common.format-name <base> -$(.build_id) : $(name) : $(type) :
        $(property-set) ] ;
}

rule tag_tagged ( name : type ? : property-set )
{
    return [ common.format-name <base> <threading> <runtime> -$(.build_id) :
        $(name) : $(type) : $(property-set) ] ;
}

rule tag_versioned ( name : type ? : property-set )
{
    return [ common.format-name <base> <toolset> <threading> <runtime>
        -$(.version_tag) -$(.build_id) : $(name) : $(type) : $(property-set) ] ;
}
